一个利用半正定规划求解 SDE/MVU 非线性数据降维的算法实现，这是论文原作者提供的 MATLAB 代码。-A MATLAB implementation of the Semi-Definite Embedding (SDE) or namely Maximum Variance Unfolding (MVU) algorithm, provided by the author himself.

matlab的.m文件，对影像计算不同方向的经验半方差,检测某区域的空间异质性-matlab' s. m files, image computing experience of semi-variance in different directions to detect spatial heterogeneity of a region